I've been following this thread sporadically as time allows, so I apologize if this has been addressed already or is perceived as not "victim friendly," but in the interest of brainstorming about all possible clues.....
Has anyone analyzed the fact that Kyron was wearing a CSI T-shirt? It just seems a little coincidental to me that he would be wearing that shirt on the very day when his little life would collide with the need for that type of science.
It's probably totally irrelevant and just a coincidence, but I was just thinking....I have boys and none of them (or any of their friends, to my knowledge) were interested in forensic science at the age of 7 (or ever, actually, lol). It just seems a little "heavy" for a kid that age, not to mention the fact that the show CSI is not something I'd allow a 7-year-old to watch (although maybe the T-shirt has nothing to do with the show). This makes me think that perhaps the person who BOUGHT the shirt for Kyron was a fan of the show or had an interest in forensics and criminal science. I know that I've seen T-shirts with things I was interested in on them and if they were on sale or something, I'd buy it for my kids or perhaps another acquaintance. I guess it's not odd that he would have a "CSI" shirt, but it does probably indicate that either Kyron or someone close to him is interested in crime scene investigation. To go further and speculate WHY he wore the shirt on that PARTICULAR DAY would probably NOT be considered victim-friendly, so I won't.
Personally, I DON'T think the step-mom is involved, but in the interest of looking at things from all angles, I thought I'd post my crazy notion, hoping it might possibly serve as some sort of catalyst to someone who's a better sleuther than I! Please remove if it violates TOS.